Extension table with leaf elevating mechanism



June 10, 1952 s. KATO EXTENSION TABLE WITH LEAF ELEVATING MECHANISM Filed Jan. l5, 1950 2 SHEETS-SHEET l INVENTOR. SE/SH/CH/ KA TO BY 23 55 28 il J %f77%azq-uwzafzz+ @man A TTORNEYS June 10, 1952 l s, KAT@ 2,599,642

EXTENSION TABLE WITH LEAF ELEVATING MECEANISM Filed Jan. 15, 195o l 2 SHEETS- SHEET 2 A TTORNEYS Patented June 10, 1.952

EXTENSION TABLE WITH LEAF ELEVATIN G MECHANISM Seishichi Kato, Honolulu, Territory of Hawaii Application January 13, 1950, Serial No. 138,392 3 Claims. (Cl. 311-46) This invention relates to tables, and more para ticularly to tables of the extensible type.

A main object of the invention is to provide a novel and improved extensible table which is simple in construction, wherein the extension leaves are contained within the table, and wherein the table may be extended or contracted with only a small amount of effort.

A further object of the invention is to provide an improved extensible table which is inexpensive to manufacture, which is sturdy in construction, which is easy to manipulate, which provides a substantially nush top surface when in extended position, and which is attractive in appearance.

Further objects and advantages of the invention will become apparent from the following description and claims, and from the accompanying drawings, wherein:

Figure 1 is a perspectivey View of an extension table constructed in accordance with the present invention, lshown in extended position;

Figure 2 is a transverse, cross-sectional view taken on line 2-2 of Figure 1 Figure 3 is a fragmentary, vertical, longitudinal cross-sectional View taken through the table of Figure 1, said view being taken on line 3-3 oi Figure 2;

Figure 4 is a horizontal, cross-sectional view taken on line 4-4 of Figure 1;

.Figure 5 is a detail, horizontal, cross-sectional View taken on line 5-5 of Figure 3;

Figure 6 is an enlarged, fragmentary, cross sectional, detail view showing the releasable latch means for locking the table leaves;

Figure 7 is an enlarged, cross-sectional detail View taken transversely through portions of two adjacent leaves of the table, the leaves being in their elevated positions;

Figure 8 is an enlarged, cross-sectional, detail view taken on line 8 3 of Figure 7 Figure 9 is an enlarged, cross-sectional, detail view taken on line 9-3 of Figure 4.

Referring to the drawings, the table is designate-d generally at II. Said table comprises a main, relatively stationary portion I 2 and arelatively movable portion I3 which is adjustable longitudinally with respect to the stationary portion. I2. Portion I2 comprises vertical end legs I4, I4 connected at their top portions by a transverse crossbar I5 and at their lower portions by a transverse crossbar I6. Designated at I1 is an inner vertical leg connected to lower crossbar I6 by a longitudinal bar' IIB andconnected to the upper crossbar I5 by a diagonal strut I9. Rigidly secured to the upper crossbar I5 and to the top end of vertical leg I'l is the table top 20, the corner =portions of the table top being secured tothe top ends of the end legs I4, I4. Secured to the side margins of the table top 20 are the longitudinal. inwardly facing channel bars ZI, 2 I said channel bars extending a short distance beyond the inner, transverse edge 22 of the table top, as shown in Figures 1 and 4.

Referring now to portion I3, it will be seen that said portion compri-ses the vertical end legs 23, 23 connected at their top portions by a crossbar 24 and at their lower portions by a crossbar E5. Designated at 26 is an inner, vertical leg connected to crossbar 25 by a longitudinal bar 21 and braced to bar 21 by a diagonal strut 28. Secured to the top ends of vertical legs 213, 23 are longitudinal bars 23, 23. Secured to the top end of inner leg 23 is a transverse bar 30 which is secured at its respective ends to the longitudinal bars 29, 29, thereby defining a rigid framework for the portion I3. The lower ends of the vertical legs 23 and 26 are provided with casters 3| to facilitate movement of the portion I3, as will be presently described.

Secured to the longitudinal bars 29, 29 are channel bars 32, 32 which are slidably and telescopically received in the channels 2|, 2l of the relatively stationary table portion I 2. Secured to the transverse bar 30 are longitudinal, Ceshaped bars 33, 33 which extend beneath the table top 2li, as shown in Figures 3 and 4. Designated at 34, 34 are longitudinal guide bars formed at their opposite sides with T-shaped ribs 35, 36. The ribs 35 are slidably engaged in the 'bars 33. The ribs 35 are slidably engaged in C-shaped, longitudinal bars 31, 3l secured to the under side of the table top 2li. Secured to the forward ends of bars `34 are lugs 38 underlying bars 33. Bars 33 are provided at their ends with projections 39 engageablewith the lugs 38 when the movable table portion I3 is extended. Secured to the forward portions of bars 34 are lugs 40 which underlie the bars 3l. Bars 31 are provided at their ends with projections 4I with which the lugs 40 are engageable when the movable table portion I3 is extended to its outermost position.

Secured to the top ends of the vertical legs 23, 23 and overlying the top edge of the crossbar 24 is a transversely extending bar member 42. Secured to member 42 are depending bar members 43, 43. Secured to the crossbar 30 in longitudinal alignment with the respective bar members 43, 43 are the respective depending bar members 44, 4,4. The respective pairs of longitudinally aligned bar members 43, 44 are connected at their lower ends by longitudinal angle bars 45 and secured to the horizontal flanges of said angle bars is a transverse, horizontal board member 4S. Secured on board member 46 are a .plurality of heavy coiled springs 41 arranged in pairs, as shown in Figure 5. Designated at 48 to 52 are a stack of leaves arranged over the springs 41 and biased upwardly thereby against the inwardly projecting top ilanges of the longi- 8, hooks 53 and eyes 54 are provided at the re' spective interfitting edges, said hooks and eyes being interengageable, as shown, to secure the elements in interiitting relation.

Secured to the lowermost leaf 48 are the vertically depending pairs of arms 55 which slidably extend through openings formed in the board member 45 and are formed at their inner edges with the inwardly facing ratchetl teeth 56.' Designated at 5l and 55 are respective bar members supported on the board member llit and arranged to interlock with the ratchet teeth 5S of the arms 5S. Each of the bar members is biased towards engagement with said ratchet teeth by a spring E9. One end of the spring is connected to the end portion of the board member and the other end of the spring is connected by a cable $5 to the mid-portion oi` the bar member. Designated at 3i is an arm pivoted at its center to the center of board member it. One end of arm 6I is connected by a cable 62 to the midportion of bar member 58 and the other end of arm 6I is connected by a cable S3 to the midportion of the other bar member 5?, Said other end of arm @i is connected by a cable 54 to the intermediate portion oi a hand lever E5 pivoted at 5B1 to board member at. By rotating hand lever 35 ccunterclockwise, as viewed in Figure 5, the bar members 5l E8 may be moved inwardly against the force of springs Se to unlock the depending ratchet arms 55. The ratchet teeth 56 are successively spaced in accordance with the thickness of the leaves,

When ther table is in its contracted position, the leaves i8 to 52 are stacked one on top of the other. When the movable portion I3 of the table is extended, the hand lever te is successively operated to unlock the arms E5 and to allow the springs el to successively raise the leaves into positions ush with the table top. As shown in Figure 3, the leaves are supported in their raised positions on the longitudinal bars t3, 33, each leaf being held manually while the movable table portion I3 is extended, whereby clearance is prog vided for the elevation oi the next leaf. As the leaves are elevated to positions ush with the table top, the hooks 53 engage the eyes 54 to hold the leaves against" extension forwardly with ref speci; tothe table top.

To contract the table, the lever 65 is first operated to unlock the end leaf, said end leaf is manually depressed, and the portion I3 of the table is moved inwardly so that the end leaf underlies the next adjacent leaf. The procedure 4 is intended that no limitations be placed on the invention except as defined by the scope of the appended claims.

What is claimed is:

1. In an extension table, a top, legs supporting the top, inwardly facing longitudinally extending channels formed on the side margins of the top. a movable frame, depending legs secured to said movable frame, longitudinally extending side elements carried by said movable frame and telescopically received in said channels, a transverse support secured between the legs of said movable frame, spring means vertically mounted on the support, a plurality of superimposed leaves stacked on the v'spring means, longitudinally extending support members carried by said movable frame and extending subadjacent the top. guide means for said support members which are adapted to support the leaves in side by side relation and aligned with the top, releasablev locking means retaining said leaves in stacked arrangement on the support against the urgement of the spring means, each of said leaves having parallel beveled side edges and interengaging connecting means on the side edges of the leaves whereby the leaves are locked together in side by side relation when in raised position.

2. In an extension table, a top, legs supporting the top, inwardly facing longitudinally extending channels formed on the side margins of' the top, a movable frame, depending legs secured to said movable frame, longitudinally extending side elements carried by said movable frame and telescopieally received in said channels, a transverse support secured between the legsrof said movable frame, spring means vertically mounted on the support, a plurality of superimposed leaves stacked on the spring means, longitudinally extending support members carried by said movable frame and extending subadjacent the top, guide means for said support members which are adapted to support the leaves in side by side relation and aligned with the top, releasable locking means retaining said leaves in stacked arrangement on the support against the urgement of the spring means, each of said leaves having parallel beveled side edges and interengaging connecting means on the side edges of the leaves whereby the leaves are locked together in side by side relation when in raised positions, said last means including cooperative hooks and eyes' formed in recesses in the side edges of the leaves.

3. In an extension table including a table top.

a movable frame, a plurality of leaves carried in stacked arrangement by the frame, supporting means on said frame extending beneath the top, and guide means for said supporting means, the improvement which consists of parallel beveled side edges formedV on each of the leaves so that the side edge of one leaf overlies the side edge of an adjoining leaf and is disposed in abutting engagement therewith, said side edges being formed with registrable recesses and` interengagV ing connecting means mounted in said recesses.

SEISHICHI KAT() REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 1,056,569` Mohr Mar. 18, 1913 1,143,853 Olson V June22, 1915 

